Pulp-beating engine



(No Model.) Q B. B. TOBIE.

v PULP BEAI'ING ENGINE.

No. 364,687. PaQtentedJune 14, 18'87.

wzliwases Xa M N. PETERS. Phoio-Lnhnyzpher. Washing n. a

I To all whom it may concern:

Be it known that I, BYRON B. TOBIE, of V UNITED STATES PATENT OFFICE,

BYRON l3. TOBIE, OF FRANKLIN FALLS, NE\V HAMPSHIRE.

PULP BEATlNG ENGINE.

SPECIFICATION forming part of Letters Patent No. 364,687, dated June 14,188?.

Application filed August 30, 188d. Serial No. 212,205 (No model.)

Franklin Falls, county of Merrimac, and State of New Hampshire,havcinvented anlmprovement in Pulp-Beating Engines, of which thefollowing description, in connection with the accompanying drawings, isaspeeification, like letters on the drawings representinglike parts.

Pulp-beating machines now commonly in use have elongated tanks, and thedisintegrating or beating devices are located either at one side of thetank or near one end, to thereby establish a current in the material asit is being beaten.

In machines of the class referred to much time is required for all thematerial contained within the tank to be brought in contact with-thebeating devices, and consequently the operation of beating is very slow;and such tanks are further objectionablabecause the material lodges atcertain points and is not acted upon by the beating devices, therebycausing much trouble in the further processes of making paper, 820.

In my experiments to improve pulp-beating in any corner I have made thebottom of the tank over which the pulp travels concave.

My invention in pulp-beating machines consists, essentially, of anupright tank or re ceptacle of comparatively small area in crosssection,having a concaved bottom, combined with disintegrating or beatingdevices located .at the lower end of the tank and extended horizontallytherein. Suitable devices are employed for adjusting the cutting orgrinding bed and the cylinder with relation to one another.

Figure 1 in end elevation shows a pulpbeating engine embodying thisinvention; Fig.

2, a vertical section of Figa 1, taken on the dotted line as w; and Fig.3, a vertical section of Fig. 2, taken on the dotted line y y.

A represents my improved upwardly-ex tended or high-column tank orreceptacle, of &

20, made cit-her in flat sections, to form a quadrangular tank, or incurved sections, or a single piece, to form a tank having curved sidewalls.

The tank A in cross-section will in practice be preferably rectangular.

The devices instrumental in disintegrating or beating the pulp consistof a cutting or grinding cylinder, a, secured to a shaft, a, journaledin suitable boxes, I) b, and a co-opcrating cutting or grinding bed, a,seated in the bottom plate, 0, of the machine, the saidgrinding-cylinder and bed extending horizontally substantially acrossthe lower portion of the said tank A.

The tank A is provided with a concaved wall or bottom plate, 0, toinsure more uniform feeding of the material to the beating devices andto prevent lodging.

The cutting or grinding bed c is herein shown as adjustable verticallyby means of a bar, (I, having an inclined top surface, upon which thebed 0 rests, the said bar d moving in slots 6 6' cut in the uprightssupporting the tank A. A'piniomf, is mounted upon the shaft carrying thecutting or grinding cylinder a, said pinion being, positively rotated bya toothed gear, f, it in turn being rotated in any usual or suitablemanner; but it is obvious that the cutting or grinding cylinder may bepositively rotated by any other suitable means.

The pulp material, cut or chipped in any .usual manner, or it may be, ifdesired, crude material, is placed in the tank or receptacle A, togetherwith a suitable supply of water,

and the beating devices operated, and as the with the disintegratingdevices, so that the opcration of beating is greatlyincrcased, therebyincreasing the capacity of work for each engine, and the material has nochance or place to lodge, and thereby escape, being acted upon by thebeating devices. The tank is divided at a, so that the top portion maybe taken off when it is desired to remove the cylinders a.

The outlet It enables the tank to be emptied, and the outlet h serveswhen washing up, but it is obvious that any other suit-able outlet maybe employed for this purpose.

I am aware that a pulp-beating machine has been devised comprising ahigh pulp-holding vessel with the disintegrating devices on the bottomthereof; but said vessel consisted of an outer shell and an inner shell,the material being contained therein, and the disintegrating deviceswere arranged but part wayacross the bottom of the vessel, so that muchti me was consumed in disintegrating the material.

I claim- 1. In apulp-beating machine, an upwardlyextended tank, A, tocontain a high column of pulp, said tank being composed of side walls,20, but having no interior construction, combined with disintegrating orbeating devices consisting of a cutting or grinding cylinder, a, and bed0, located at the lower end of the tank A and extending horizontally for0 substantially the entire length of the tank, substantially as and forthe purpose described.

2. In a pulp-beating machine, an upwardlyextended tank, A, to contain ahigh column of pulp, said tank being composed of side 35 walls, 20, buthaving no interior construction, and having a concaved bottom, 0,combined with disintegrating or beating devices consist ing ofa cuttingor grinding cylinder, a, and

bed 0, located at the lower end of the tank A 4c and extendinghorizontally for substantially the entire length of the tank,substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two 5

